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WRITEOLE.CPP
Package: huff_stream.zip　[view]
Upload User: zdlsnail
Upload Date: 2007-01-06
Package Size: 16k
Code Size: 2k
Category:

Compress-Decompress algrithms

Development Platform:

Visual C++

WRITEOLE.CPP：Code Content
  1. #include <ole2.h>
  2. #include <ole2ver.h>
  3. #include <stdio.h>
  4. #include <stdlib.h>
  5. #include <windows.h>
  6. #include <string.h>
  7. BOOL InitCOM()
  8. {
  9.    DWORD coVersion=CoBuildVersion();
  10.    if( HIWORD(coVersion)!=rmm||LOWORD(coVersion)<rup )
  11.    {
  12.       printf("bad version of COMn");
  13.       return FALSE ; 
  14.         }
  15.    HRESULT hErr=CoInitialize(NULL);
  16.    if(FAILED(GetScode(hErr))) 
  17.      { printf("Failed to initialize OLE!n");
  18.        return  FALSE ; }
  19.  return TRUE ;
  20. }
  23. void DeinitCOM()
  24. {
  25.    CoUninitialize();
  26. }
  29. void readOleFile( char * mfilename,
  30.   char * mstreamname,
  31.   char * buffer,
  32.   long * length)
  33. {
  34.   HRESULT    hErr ;
  35.   LPSTORAGE  pStg ;
  36.   LPSTREAM   pStm ;
  37.   LARGE_INTEGER dlibMove;
  38.   wchar_t wfilename[120];
  39.   wchar_t wstreamname[64];
  40.   int iMessageSize=96,k,j;
  41.   dlibMove.LowPart=0;
  42.   dlibMove.HighPart=0;
  43.   if( !InitCOM()) return;
  44.   while((SetMessageQueue(iMessageSize)==0)&&(iMessageSize>0)){
  45.       iMessageSize-=8;}
  46.  
  47.   j=strlen(mfilename);
  48.   k=mbstowcs(wfilename,mfilename,j+1);
  49.   j=strlen(mstreamname);
  50.   k=mbstowcs(wstreamname,mstreamname,j+1);
  51.   
  52.   hErr=StgOpenStorage(
  53.           wfilename,
  54.   NULL,
  55.   STGM_TRANSACTED|STGM_WRITE,
  56.   NULL,
  57.   0,
  58.   & pStg);
  59.  if(FAILED(hErr)) { DeinitCOM();* length=0;return;} 
  61.  hErr=pStg->OpenStream( wstreamname,
  62.                     0,
  63. STGM_READWRITE|STGM_DIRECT|STGM_SHARE_EXCLUSIVE,
  64.                         0,
  65. &pStm );
  66.  if(FAILED(hErr)) {
  67.    pStg->Release(); DeinitCOM();*length=0;return;}
  68.  hErr=pStm->Seek(dlibMove,STREAM_SEEK_END,NULL); 
  69.  if(FAILED(hErr)) {
  70.     pStm->Release();
  71. pStg->Release();
  72.    DeinitCOM();
  73.    *length=0;
  74.    return;}
  75.  j=strlen(buffer);
  76.  hErr=pStm->Write(buffer,j,(unsigned long *)length);
  77.  if(FAILED(hErr)) {
  78.     pStm->Release();
  79. pStg->Release();
  80.    DeinitCOM();
  81.    *length=0;
  82.    return;}
  83.  hErr=pStm->Commit(STGC_DEFAULT);
  84.  if(FAILED(hErr)) {
  85.     pStm->Release();
  86. pStg->Release();
  87.    DeinitCOM();
  88.    *length=0;
  89.    return;}
  90.  hErr=pStm->Release();
  91.  hErr=pStg->Commit(STGC_DEFAULT);
  92.  if(FAILED(hErr)) {
  93.    pStg->Release();
  94.    DeinitCOM();
  95.    *length=0;
  96.    return;}
  97.  hErr=pStg->Release();
  98.  DeinitCOM();return;
  99. }